CN105525959A - Valve-timing control apparatus for internal combustion engine - Google Patents

Abstract

The invention provides a valve-timing control apparatus for internal combustion engine. The apparatus can prevent the phenomenon that wear powder of power supply brush is adhered on an angle detection part so as to guarantee the good detection precision of the angle detection part. The power supply brush (47a, 47b) is arranged on the peripheral direction that is right above the plummet direction of the target (64) of an angle sensor (60) and is not overlapped with the target (64). Under the situation, the phenomenon that wear powder of power supply brush (47a,47b) is adhered on the target (64) caused by reduced gravity is prevented, and the good detection precision of the angle sensor (60) is ensured.

Description

The Ventilsteuerzeitsteuervorrichtung of internal-combustion engine

Technical field

The present invention relates to a kind of Ventilsteuerzeitsteuervorrichtung of the valve timing control for carrying out based on the rotating force of electric actuator.

Background technique

As Ventilsteuerzeitsteuervorrichtung in the past, there will be a known the such as following Ventilsteuerzeitsteuervorrichtung described in patent documentation 1.

Namely, in this Ventilsteuerzeitsteuervorrichtung, power supply board is configured with in the forward end of electric motor, and the outside of this power supply board is covered by cap assembly, make to be located at sliding freely the slip ring being located at the outer side surface of power supply board for brush contact in the retaining hole that cap assembly has, thus electric motor is powered.

And, the angle detection part of so-called electromagnetic induction type is provided with between cap assembly and the axial direction of motor output shaft, this angle detection part by be fixed on motor output shaft top detected portion and separate the axial clearance of regulation with this detected portion and form with the detection unit that cap assembly is oppositely disposed, by detecting the angle of swing of motor output shaft with this angle detection part, for carrying out the drived control of electric motor.

Prior art document

Patent documentation 1: Japanese Unexamined Patent Publication 2013-036401 publication

Summary of the invention

But, in described Ventilsteuerzeitsteuervorrichtung in the past, due to the structure adopting power supply brush to be configured at the end haply of the vertical of cap assembly, therefore when the wearing and tearing powder produced in the sliding contact because of power supply brush and retaining hole declines based on gravity, worry that this wearing and tearing powder is attached to angle detection part, cause the testing precision of this angle detection part to reduce.

The present invention files an application in view of the actual conditions of described Ventilsteuerzeitsteuervorrichtung in the past, the unfavorable condition that its object is to provide a kind of wearing and tearing powder that power supply can be suppressed to brush to be attached to angle detection part thus can guarantee the Ventilsteuerzeitsteuervorrichtung of the internal-combustion engine of good testing precision for this angle detection part.

The present invention is a kind of Ventilsteuerzeitsteuervorrichtung of internal-combustion engine, by changing the relatively rotation place of the 2nd parts relative to the 1st parts, the performance characteristic of engine valve can be changed, it is characterized in that, the Ventilsteuerzeitsteuervorrichtung of this internal-combustion engine comprises: electric motor, and it makes the 2nd parts relatively rotate relative to described 1st parts by making motor output shaft rotate; Reducing gear, the rotation of described motor output shaft is slowed down and is delivered to described 2nd parts by it, thus described 2nd parts are rotated relatively relative to described 1st parts; Slip ring, it is located at the side, top of described electric motor; Cap assembly, it is arranged in the mode at least partially of the side, top covering described electric motor; Power supply is brushed, and it is located at described cap assembly, and contacts with described slip ring; And angle detection mechanism, it has the detected portion of being located at described motor output shaft and is located at described cap assembly and the detection unit be oppositely disposed across axial clearance and the described detected portion of regulation, for detecting the angle of swing of described motor output shaft; Described power supply brush is set to and does not overlap with this detected portion directly over the vertical of described detected portion.

According to the present invention, because power supply brush is configured to not overlap with this detected portion directly over the vertical of detected portion, even if therefore when the wearing and tearing powder of power supply brush declines because of gravity, also this wearing and tearing powder can be suppressed to be attached to the unfavorable condition of detection unit, the good testing precision of this angle detection part can be guaranteed.

Accompanying drawing explanation

Fig. 1 is plan view that represent the 1st mode of execution of Ventilsteuerzeitsteuervorrichtung of the present invention, this Ventilsteuerzeitsteuervorrichtung.

Fig. 2 is the A-A line sectional view of Fig. 1.

Fig. 3 is the exploded perspective view that the Ventilsteuerzeitsteuervorrichtung shown in Fig. 2 resolves into main constituting component.

Fig. 4 is the B-B line sectional view of Fig. 2.

Fig. 5 is the C-C line sectional view of Fig. 2.

Fig. 6 is the rear view of the power supply board shown in Fig. 3.

Fig. 7 is the rear view of the cap assembly shown in Fig. 3.

Fig. 8 is the D-D line sectional view of Fig. 7.

Fig. 9 is the E-E line sectional view of Fig. 7.

Figure 10 is the F-F line sectional view of Fig. 2.

Figure 11 (a) and (b) represent the detected portion shown in Fig. 2, and (a) is plan view, and (b) is side view.

Figure 12 (a) ~ (c) represents the detection unit shown in Fig. 2, and (a) is plan view, and (b) is side view, (c) worm's eye view.

Figure 13 is figure that represent the 2nd mode of execution of Ventilsteuerzeitsteuervorrichtung of the present invention, that be equivalent to Fig. 7.

Figure 14 is figure that represent the 3rd mode of execution of Ventilsteuerzeitsteuervorrichtung of the present invention, that be equivalent to Fig. 7.

Description of reference numerals

2 ... camshaft 11 ... Ventilsteuerzeitsteuervorrichtung 12 ... cap assembly 13 ... timing sprocket (the 1st parts) 14 ... driven member (the 2nd parts) 21 ... electric motor 22 ... reducing gear 26 ... output shaft assembly (motor output shaft) 47a, 47b ... power supply brush 36a, 36b ... slip ring 60 ... angle transducer (angle detection mechanism) 61 ... detected portion 62 ... detection unit 64 ... target.

Embodiment

Below, each mode of execution of the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine of the present invention is described based on accompanying drawing.In addition, in following each mode of execution, as this Ventilsteuerzeitsteuervorrichtung, the Ventilsteuerzeitsteuervorrichtung of exemplary application in suction valve side is described.

(the 1st mode of execution) Fig. 1 ~ Figure 12 represents the 1st mode of execution of the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine of the present invention, as shown in FIG. 1 to 3, this Ventilsteuerzeitsteuervorrichtung 11 possesses: as the timing sprocket 13 of the 1st parts (driving rotating bodies), its bent axle from the motor as internal-combustion engine (not shown) transmit rotary driving force, and with this crankshaft-synchronous rotate; As the driven member 14 of the 2nd parts (driven rotation body), it is fixed on an end of camshaft 2, and rotates integratedly with this camshaft 2, and described camshaft 2 is rotatably freely supported on cylinder cap 1 via bearing B0; Phase place change mechanism 15, it is located between described timing sprocket 13 and described driven member 14, and with the operating condition of motor correspondingly change described both 13,14 relative rotation phase; And cap assembly 12, it is arranged in the mode of the forward end covering this phase place change mechanism 15.

The metallic material of described timing sprocket 13 whole utilization iron class forms, and be made up of tubular base portion 13a and teeth portion 13b, this tubular base portion 13a forms the sprocket body that inner peripheral surface is formed as ladder footpath shape, this teeth portion 13b is located at the periphery, the other end of this tubular base portion 13a integratedly, and the rotary driving force of described bent axle is transmitted via the not shown timing chain reeled, described timing sprocket 13 is rotatably bearing on the driven member 14 of the inner circumferential side being configured at described tubular base portion 13a via the 1st bearing B1 as known ball bearing.And, one end of described tubular base portion 13a makes this end side opening by shutoff because arranging electric motor 21 described later, on the other hand, the other end side opening is by roughly discoideus baffle plate 16 shutoff, and this baffle plate 16 is by fixing fastened for multiple 1st bolt T1 fastening with electric motor 21 for described timing sprocket 13.

Described driven member 14 is provided with integratedly: tubular base portion 17, and it is located at the radial middle position of driven member 14; Plectane portion 18, it extends to radial outside in the axial neutral position of this tubular base portion 17; And roller holding part 19, it is extended on vertically with expanding shape and towards electric motor 21 side axially an end (end of electric motor 21 side described later) in this plectane portion 18, and keeps multiple roller 20 in the circumferential.And, described tubular base portion 17 chimeric with the protuberance 2a being provided projectingly on this camshaft 2 by the end (the other end 17c described later) of camshaft 2 side, thus by this driven member 14 with ensure that with this camshaft 2 and the state of alignment be fixed on camshaft 2 by cam bolt T0.

Described tubular base portion 17 is provided with the patchhole 17a running through its central part vertically, the 2nd bearing B2 as known needle bearing is embedded with at the outer circumferential face of one end (end of electric motor 21 side described later) 17b, on the other hand, its other end (end of camshaft 2 side) 17c is formed as the recess chimeric with the protuberance 2a being provided projectingly on camshaft 2.In addition, in the end side of this tubular base portion 17, adjacent known ball bearing i.e. the 3rd bearing B3 be configured with for the swivel bearing of output shaft assembly 26 described later vertically, the inner ring of the 3rd bearing B3 is clamped between one end of tubular base portion 17 and the head of cam bolt T0.

In the assigned position of the circumference in described plectane portion 18, run through the oilhole 18a described later of the lubrication be formed with for the 2nd, the 3rd bearing B2, B3 etc. from camshaft 2 side.In addition, be embedded with the 1st bearing B1 at the outer circumferential face in this plectane portion 18, rotatably support timing sprocket 13 by the 1st bearing B1.

Described roller holding part 19 is configured to roughly tubular, runs through the roller retaining hole 19a be formed with for keeping described multiple roller 20 in the assigned position of its circumference respectively, accommodates each roller 20 respectively and remained rotatable in this each roller retaining hole 19a.

As shown in Fig. 2, Fig. 5, run through the shaft insertion hole 16a of the end insertion be formed with for camshaft 2 at the middle position of described baffle plate 16.And, in the predetermined range of the circumference of this axle receiving bore 16a, the restriction protuberance 16b that the outstanding restriction recess 2b being formed with the circular arc concavity be formed on a periphery, end of camshaft 2 to cutting snaps in.According to this structure, each side 16c, 16d of this restriction protuberance 16b abut with each side 2c, 2d of relative described restriction recess 2b respectively, thus limit both relative movement of 2,16.In other words, only in the scope of the circumferential width of described restriction recess 2b, driven member 14 is allowed to the relative rotation of camshaft 2 with the relative rotation of baffle plate 16, i.e. timing sprocket 13.

As shown in Figure 2, described phase place change mechanism 15 is coaxial going up and electric actuator by being driven in rotation from the control electric current of not shown electronic control unit of being disposed in camshaft 2 via driven member 14, formed primarily of with lower component: electric motor 21, it changes moment of torsion for generation of phase place; Reducing gear 22, it is located between this electric motor 21 and driven member 14, slows down to the output of described electric motor 21 and transmits.In addition, about described electronic control unit, based on the engine operating status obtained from various sensor class such as such as not shown crank angle sensor, Air flow meter, cooling-water temperature sensor, throttle sensors, electric motor 21 described in drived control.

Described electric motor 21 is the DC motors having brush (the 1st, the 2nd brush 34a, 34b described later), and form primarily of such as lower component: the yoke 23 of bottomed cylindrical, it is fastened on timing sprocket 13 by described each 1st bolt T1, and rotates integrally with this timing sprocket 13; Cylinder as stator splits a pair permanent magnet 24a, 24b of shape, and it is fixed on the inner peripheral surface of this yoke 23; As the armature 25 of rotor, it is rotatably located at the inner circumferential side of these two permanent magnets 24a, 24b; Output shaft assembly 26, it inserts the inner circumferential side being fixed on this armature 25 in the mode that can rotate integrally, and for the output of described armature 25; Commutator 27, it is located at the periphery, end extended to yoke 23 opening side of this output shaft assembly 26; And administration of power supply 28, it is arranged with the form of the end side opening of yoke described in shutoff 23, and for powering to armature 25 (coil 25b described later) via described commutator 27.

Described yoke 23 is made up of cylindrical part 23a and bottom wall portion 23b, and this cylindrical part 23a is set to the external diameter roughly the same with the tubular base portion 13a of timing sprocket 13, and this bottom wall portion 23b is located at the end relative with timing sprocket 13 of this cylindrical part 23a.And, in series configure vertically relative to this timing sprocket 13 in the mode of the end side opening of the outer side surface shutoff timing sprocket 13 by described bottom wall portion 23b, fastening integratedly by running through described each 1st bolt T1 of timing sprocket 13 and timing sprocket 13 and baffle plate 16, and the end side opening of described cylindrical part 23a is powered mechanism 28 (power supply board 31 described later) shutoff.

In addition, in the substantial middle position of described bottom wall portion 23b, run through the shaft insertion hole 23c being formed with and inserting for output shaft assembly 26, be connected to reducing gear 22 by this shaft insertion hole 23c towards the other end of the output shaft assembly 26 of driven member 14 side.In addition, be provided with in the peritreme by reducing gear 22 side of this shaft insertion hole 23c the 1st sealed member S1 sealed in liquid-tight manner by the motor containing space 29 of the inner circumferential side being formed at described yoke 23, restrain lubricant oil by the 1st sealed member S1 and flow into from motor containing space 29 described in reducing gear 22 side direction.

Described armature 25 is made up of the multiple coil 25b being located at the iron core of axial intermediate portion periphery of output shaft assembly 26 and rotor 25a and being wound in this rotor 25a, and described each coil 25b is electrically connected with power supply board 31 via commutator 27, can be energized thus.

Described output shaft assembly 26 adopts following structure: in the axial end side relative with driven member 14, side is supported on cam bolt T0 via described 2nd bearing B2, and outer side is supported on driven member 14 via described 2nd bearing B2.In addition, in an end of this output shaft assembly 26, be provided with eccentric axial portion 30 described later integratedly, the axle center of this eccentric axial portion 30 is formed as different from other axial region in this spindle unit 26, and this eccentric axial portion 30 forms a part for described reducing gear 22.

Described administration of power supply 28 is made up of power supply board 31 and cap assembly 12, this power supply board 31 is arranged in the mode of the end side opening of shutoff yoke 23, and for powering via commutator 27 pairs of armatures 25 (coil 25b), this cap assembly 12 links in the mode of the outer side surface covering this power supply board 31 and is configured at this power supply board 31, and carries out the drived control of electric motor 21 for the control electric current by applying from described electronic control unit.

Described power supply board 31 is formed as the inner side insulation division 31b of resinous insulation division and outside insulation division 31c respectively by mold formed being provided with by bi-side inside and outside the core 31a utilizing ferrous metal material to be formed as roughly discoideus, and is fixed by caulking to the open end of the end side of yoke 23 via described core 31a.

In addition, as shown in Fig. 2, Fig. 6, on this power supply board 31, cutting be formed at the circumferential assigned position of core 31a, the insulation division 31b side, described inner side of variform two retaining hole 32a, 32b is mounted with metal a pair brush holder 33a, 33b, in these each brush holder 33a, 33b, collecting is configured with and is set as the switching that can be slidingly contacted at commutator 27 from outer circumferential side and brushes 34a, 34b and this is respectively brushed spring 35a, 35b that 33a, 33b exert a force to commutator 27 side respectively.

And at described outside insulation division 31c, brushing the relative radial position of 47a, 47b with the described later each power supply being disposed in cap assembly 12, interior periphery is provided with a pair slip ring 36a, 36b doubly.In addition, these slip rings 36a, 36b utilizes and inserts described each retaining hole 32a, wire harness 37a, 37b of 32b brush 34a, 34b with described each switching and be electrically connected.

As shown in Figure 1 and Figure 2, described cap assembly 12 is made up of roughly discoideus cover main body 41 and cover portion 42, this cover main body 41 is formed as the large footpath shape larger than electric motor 21 (yoke 23), and be oppositely disposed with the form of the outer side surface covering power supply board 31 (outside insulation division 31c), this cover portion 42 is flush-mounted in the lateral part of this cover main body 41, and covering the front end of this cover main body 41, described cap assembly 12 is fastened by bolts in not shown chain cover via multiple lip part 43a of the peripheral part being located at described cover main body 41.

As shown in Figure 8, Figure 9, described cover main body 41 by by resin portion 43 and core 44 mold formed integratedly and form, this resin portion 43 utilizes synthetic resin material to be formed, and the metallic material that this core 44 utilizes linear expansion coeffcient less than the described synthetic resin material forming this resin portion 43 is formed at the inside of this resin portion 43.

As shown in Fig. 8, Figure 10, described core 44 is in roughly discoideus, run through the patchhole 44a be formed with for the circular shape inserted for angle transducer 60 (tubular base portion 63) described later in its substantial middle position, be formed with the window portion 44b for inserting the substantially rectangular shape of configuration etc. for each power supply brush 47a, 47b described later in the cutting of the peripheral region of this patchhole 44a.

Particularly, as shown in Figure 7, described two window portion 44b all radially configure side by side with the form relative with described each slip ring 36a, 36b on the horizontal line H at the center by described patchhole 44a.Namely, this two window portion 44b is located at the target (タ ー ゲ ッ ト of the detected portion 61 forming angle transducer 60 described later) directly over the vertical of 64, the circumferential position do not overlapped with this target 64, particularly the sense of rotation R of timing sprocket 13 has in the so circumferential scope Ad of composition Rd on the downside of vertical (with reference to Fig. 7), orthogonal with power supply connector 43b described later and connector for communication 43c, and the circumferential position do not overlapped with the target 64 of angle transducer 60 described later in the horizontal direction, even if form each power supply brush 47a, the wearing and tearing powder of 47b declines because of gravity, also this wearing and tearing powder can not be caused to be attached to the structure of the target 64 of angle transducer 60 described later.

As shown in Fig. 7 ~ Figure 10, described resin portion 43 is in roughly discoid, projecting in its edge, periphery have four lip part 43a, and the roughly lower end side position between these two lip parts 43a, 43a, gives prominence to towards vertical lower side the power supply connector 43b and connector for communication 43c that are formed with and are formed with roughly square tube shape respectively.And, run through at the inner side surface relative with power supply board 31 of this resin portion 43 and be formed with a pair brush retaining hole 45a, 45b, by insert the retaining hole component parts that remains in this each brush retaining hole 45a, 45b and metal a pair brush holder 46a, 46b and towards the power supply of outside brush 47a, 47b can with each slip ring 36a, 36b sliding contact.

Here, described each power supply brush 47a, 47b are movably contained in the described synthetic resin material by being filled in the window portion 44b of core 44 and are molded in described each brush holder 46a, 46b of fixing roughly square tube shape, and torsion coil spring 49a, 49b that each terminal side is fixedly set in core 44 are to power supply board 31 side force, and from the end side opening portion of each brush holder 46a, 46b towards the tip portion of power supply board 31 and each slip ring 36a, 36b sliding contact.

In addition, retaining hole of the present invention is made up of the space portion in described each brush holder 46a, 46b, forms this retaining hole by metal brush holder 46a, the 46b relatively high by rigidity, can guarantee the stable slip of each power supply brush 47a, 47b.And, form this retaining hole by described each brush holder 46a, the 46b being used as miscellaneous part, except can guaranteeing the suitable and stable slip of each power supply brush 47a, 47b, also can realize light, miniaturization etc.In addition, by radially configuring each power supply brush 47a, 47b and slip ring 36a, 36b side by side, each power supply can be made to brush 47a, 47b vertically contact with the sense of rotation of each slip ring 36a, 36b, result, can guarantee the stable power supply for electric motor 21.

In addition, in the substantial middle position of the inner side surface of described resin portion 43, be arranged with the accommodating part 43d of the concavity holding detected portion 61 described later in the mode of the patchhole 44a inserting core 44.And, be provided with the diapire 43e of very thin wall in the bottom of this accommodating part 43d, be mounted with control substrate 65 described later at the outer side surface of this diapire 43e via the positioning convex portion 43f being provided projectingly on this.

Described cover portion 42, in roughly discoideus, be pressed into the outside outer periphery of cover main body 41 (resin portion 43) by the annular convex 42a erected from its edge, periphery and be mounted on cover main body 41.

As shown in Figure 9, Figure 10, the one end portion of the described power supply pair of end sub-pieces 53a being embedded in the inside of cover main body 41 of connector 43b, 53b not be connected to each power supply and be connected with each tail optical fiber distribution 54a, 54b of the rearward end of brushing 47a, 47b, and the other end of externally exposing is connected with the connector (not shown) of described electronic control unit side.

As shown in Fig. 8, Figure 10, the end being embedded in multiple terminal plates 55 of the inside of cover main body 41 of described connector for communication 43c is connected with control substrate 65 described later, and the other end of externally exposing is connected with the connector (not shown) of described electronic control unit side.

In addition, between the accommodating part 43d and output shaft assembly 26 of described cover main body 41, be provided with the angle transducer 60 of the rotary angle position detecting this output shaft assembly 26.This angle transducer 60 is sensors of so-called electromagnetic induction type, as shown in Fig. 2, Figure 11, Figure 12, be made up of detected portion 61 and detection unit 62, this detected portion 61 is fixed on output shaft assembly 26, this detection unit 62 is fixed on the substantially central portion of cover main body 41, and the induction electromotive force that detection produces based on the induction current (foucault current) that described detected portion 61 produces.By adopting the sensor of this electromagnetic induction type, thus being difficult to when detecting the angle of described output shaft assembly 26 impact being subject to electric motor 21, can be used for carrying out good angle and detecting.

As shown in figure 11, described detected portion 61 is made up of tubular base portion 63 and target 64, this tubular base portion 63 utilizes the synthetic resin material of regulation to be formed as roughly bottomed cylindrical, and the tip portion inner peripheral surface of output shaft assembly 26 is fixed on by being pressed into, this target 64 is fixed on the outer bottom of the top end as this tubular base portion 63, and utilizes the thin metal plate of the trilobal shape be made up of the conductive material specified to be formed.

As shown in figure 12, described detection unit 62 is made up of such as lower component: roughly rectangular control substrate 65, and its substantially central portion from cover main body 41 is radially extended; Intergrated circuit (ASIC) 66, it is located at an end outer surface of the length direction of this control substrate 65; As the oscillator coil 67 of primary winding, the other end outer surface of the length direction of described control substrate 65 is relatively located at by itself and described target 64, and makes this target 64 produce high frequency magnetic field; And as the Test coil 68 of Secondary coil, it detects the electromagnetic induction effect of the induction current (foucault current) produced based on target 64 and the induction electromotive force produced.

According to this structure, based on the high frequency magnetic field (from oscillator coil 67 towards the magnetic flux of target 64) produced by applying high frequency current to described oscillator coil 67, flow through in the metal surface of target 64 as faradic foucault current, in Test coil 68, induction electromotive force is produced based on the reverse magnetic flux produced under the electromagnetic induction effect of this foucault current, result, based on the rotation along with target 64, the change of the distance (gap) between target 64 and Test coil 68, detect the change (change of inductance) of described induction electromotive force, and by with intergrated circuit 66, the result that it carries out angle computing is exported to described electronic control unit.

As shown in Figure 2 and Figure 3, described reducing gear 22 is made up of such as lower component: eccentric axial portion 30, and it is formed in the mode of carrying out eccentric rotational motion along with the rotation of this output shaft assembly 26 in an end of the output shaft assembly 26 of electric motor 21; Known ball bearing i.e. the 4th bearing B4 of relatively large footpath shape, it is pressed into the outer circumferential face of this eccentric axial portion 30; Described multiple roller 20, it is rotatably held in the roller holding part 19 of driven member 14, and rotates on the outer circumferential face of described 4th bearing B4 all the time along with the rotation of described eccentric axial portion 30; And cross section is multiple internal tooth 13c of roughly arc-shaped, the complete cycle of the inner peripheral portion of the timing sprocket 13 (tubular base portion 13a) that its edge is oppositely disposed with the outer circumferential side of this each roller 20 is formed, and engages with each roller 20.

And, the radial clearance of the ring-type of the width of more than the diameter with each roller 20 is formed between the outer shroud outer circumferential face and described multiple internal tooth 13c of described 4th bearing B4, based on this radial clearance, 4th bearing B4 entirety can be carried out bias along with the eccentric rotary of described eccentric axial portion 30 and be moved, mobile along with this bias, each roller 20 is to moving radially, thus the roller 20 of a part embeds (engagement) in described arc groove 13c, thus, the rotary driving force of timing sprocket 13 is passed to driven member 14.

More specifically, rotate a circle with described eccentric axial portion 30, each roller 20 staggers one (amount of a tooth) with the engaging position of each arc groove 13c, according to this structure, the rotation of electric motor 21 is decelerated and transmits, and based on the rotation of this electric motor 21, driven member 14 rotates relatively relative to timing sprocket 13.

In addition, in the inside of described reducing gear 22, be supplied to lubricant oil by not shown lubricant oil supply part.As shown in Figure 2, this lubricant oil supply part is formed primarily of such as lower component: import path 2c, and its inside along camshaft 2 is axially formed, and by the interior oil path of described cylinder cap by not shown main oil gallery guiding lubricant oil; And oilhole 18a, formation is axially run through in its inside along driven member 14, and one end is connected to described importing path 2c, and the other end is to the bearing portion opening be made up of described 2nd, the 4th bearing B2, B4; By guiding the lubricant oil from described main oil gallery, the lubrication of described each bearing B2, the B4 etc. forming reducing gear 22 can be carried out.

Below, based on Fig. 2, the action effect of the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine of the present invention is described.

First, when engine start, described Ventilsteuerzeitsteuervorrichtung 11 is controlled to maximum sluggish angle, by bent axle described in not shown starter motor rotary actuation, thus via described timing chain, timing sprocket 13 is rotated, its rotating force makes electric motor 21 synchronous rotary via yoke 23 etc., and the rotating force of timing sprocket 13 is by the reducing gear 22 that is made up of roller 20 and roller holding part 19 etc. and transmit to camshaft 2 with its driven member 14 linked, the cam that this camshaft 2 has rotates, thus, not shown suction valve opening and closing work.Like this, when engine start etc., controlled overlappingly by apneustic, waste gas can be suppressed to the backflow of suction port, and improve startability.

Then, during engine running after this engine start, based on the control signal rotary actuation electric motor 21 from described control unit, thus the rotating force of this electric motor 21 is transmitted to camshaft 2 via reducing gear 22.Thus, relative to timing sprocket 13, camshaft 2 positive and negatively (just against To) rotates relatively, and both relative rotation phase of 2,13 is changed, result, and the opening and close timing of suction valve is altered to desired timing at (valve timing).Specifically, such as, according to the rising of operating load, advance angle control is carried out to Ventilsteuerzeitsteuervorrichtung 11, thus valve overlap is increased.According to this control, except improving except moment of torsion, the optimization of the burning corresponding to operating condition such as the combustion efficiency raising increasing or produced by the reduction of pumping loss of the toxic emission produced by the increase of internal EGR can also be realized.

As described above, in described Ventilsteuerzeitsteuervorrichtung 11, described power supply board 31 rotates to a direction integratedly with timing sprocket 13, result, the rotation of each slip ring 36a, 36b is towed, and the sidepiece (outer circumferential face) of each power supply brush 47a, 47b is crimped on the top edge of each brush holder 46a, 46b, therefore, each power supply brush 47a, 47b slide with this state, produce the wearing and tearing powder of this each power supply brush 47a, 47b thus.So, about this wearing and tearing powder because gravity declines this point below vertical, in the Ventilsteuerzeitsteuervorrichtung 11 of present embodiment, due to directly over the vertical that each power supply brush 47a, 47b are configured in the target 64 of angle transducer 60, the circumferential position that do not overlap with this target 64, the unfavorable condition that the wearing and tearing powder that each power supply declined because of described gravity therefore can be suppressed to brush 47a, 47b adheres to target 64.

And, respectively power with brush 47a, 47b for this, due in the circumferential position do not overlapped with this target 64 directly over the vertical that it is configured at the target 64 of angle transducer 60, particularly the sense of rotation R of timing sprocket 13 have in the so circumferential scope Ad of composition Rd on the downside of vertical, therefore no longer worry that the above-mentioned wearing and tearing powder because of gravity decline is rolled because of the rotation of timing sprocket 13 (power supply board 31), can more effectively suppress this wearing and tearing powder to adhere to target 64.

(the 2nd mode of execution) Figure 13 represents the 2nd mode of execution of the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine of the present invention, and changes the configuration of each power supply brush 47a, the 47b in described 1st mode of execution.In addition, the structure of brushing except being configured to of 47a, 47b except this each power supply is identical with described 1st mode of execution.

Namely, in the present embodiment, in the circumferential position do not overlapped with this target 64 directly over the vertical each power supply brush 47a, 47b being located at the target 64 of angle transducer 60, particularly the sense of rotation R of timing sprocket 13 there is the so circumferential scope Au of composition Ru on the upside of vertical and be than the position of target 64 by tilting on the upside of vertical and with vertical.

Even if when adopting this structure, because each power supply brush 47a, 47b are configured at the circumferential position do not overlapped with this target 64 directly over the vertical of the target 64 of angle transducer 60, therefore identical with described 1st mode of execution, the unfavorable condition that the wearing and tearing powder that each power supply declined because of gravity can be suppressed to brush 47a, 47b adheres to target 64.

(the 3rd mode of execution) Figure 14 represents the 3rd mode of execution of the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine of the present invention, and changes the configuration of each power supply brush 47a, the 47b in described 1st mode of execution.In addition, the formation of brushing except being configured to of 47a, 47b except this each power supply is identical with described 1st mode of execution.

Namely, in the present embodiment, the circumferential position do not overlapped with this target 64 directly over the vertical each power supply brush 47a, 47b being located at the target 64 of angle transducer 60 and particularly than target 64 by the position on the downside of vertical, the position immediately below the vertical being specifically equivalent to target 64.In addition, when adopting this structure, connector for communication 43c adopts the structure configured immediately below unlike described 1st mode of execution but to the clockwise drift in figure in wiring.

As described above, even if when adopting the structure of present embodiment, result immediately below each power supply is brushed vertical that 47a, 47b be positioned at the target 64 of angle transducer 60, even if each power supply wearing and tearing powder of brushing 47a, 47b declines because of gravity, also identical with described 1st mode of execution, the unfavorable condition that this wearing and tearing powder adheres to target 64 can be suppressed.

The present invention is not limited to the structure of described mode of execution, bring the structure of the position of impact or the concrete of parts can not to action effect of the present invention for such as described electric motor 21, reducing gear 22 etc., also suitably can change according to the specification etc. of device, mounting object.

In addition, described angle transducer 60 is not limited to the electromagnetic induction type disclosed in described each mode of execution, also can be made up of other the structure (principle) such as angle transducer of such as Hall IC type.

Below, to grasp according to described each mode of execution, technological thought except record of the present invention is described.

A the Ventilsteuerzeitsteuervorrichtung of () internal-combustion engine according to technological scheme 4, is characterized in that, described cap assembly utilizes resin material to be shaped integratedly, described retaining hole utilizes the retaining hole component parts being embedded in described cap assembly to form.

B the Ventilsteuerzeitsteuervorrichtung of () internal-combustion engine according to technological scheme 1, is characterized in that, described slip ring is made up of two the planar rings arranged in concentric circles, and described power supply brush is by forming with two brushes of described each planar loop contacts respectively.

The Ventilsteuerzeitsteuervorrichtung of c internal-combustion engine that () is recorded according to described (b), it is characterized in that, described cap assembly has for the power supply connector to the power supply of described power supply brush, and described power supply connector becomes the direction of approximate right angle extended to relative to the straight line linked by described two brushes.

Claims (10)

1. a Ventilsteuerzeitsteuervorrichtung for internal-combustion engine, by changing the relatively rotation place of the 2nd parts relative to the 1st parts, can change the performance characteristic of engine valve, it is characterized in that, the Ventilsteuerzeitsteuervorrichtung of this internal-combustion engine comprises:

Electric motor, it makes the 2nd parts relatively rotate relative to described 1st parts by making motor output shaft rotate;

Reducing gear, the rotation of described motor output shaft is slowed down and is delivered to described 2nd parts by it, thus described 2nd parts are rotated relatively relative to described 1st parts;

Slip ring, it is located at the side, top of described electric motor;

Cap assembly, it is arranged in the mode at least partially of the side, top covering described electric motor;

Power supply is brushed, and it is located at described cap assembly, and contacts with described slip ring; And

Angle detection mechanism, it has the detected portion of being located at described motor output shaft and is located at described cap assembly and the detection unit be oppositely disposed across axial clearance and the described detected portion of regulation, for detecting the angle of swing of described motor output shaft;

Described power supply brush is set to and does not overlap with this detected portion directly over the vertical of described detected portion.

2. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 1, is characterized in that,

Described power supply brush is arranged in the retaining hole being formed at described cap assembly sliding freely.

3. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 2, is characterized in that,

Described cap assembly utilizes resin material to be shaped integratedly,

Described retaining hole utilizes the retaining hole component parts being embedded in described cap assembly to form.

4. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 1, is characterized in that,

The sense of rotation that described 1st parts are located at by described power supply brush has the so circumferential scope of composition on the downside of vertical.

5. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 4, is characterized in that,

Described power supply brush is located at than described detected portion by the downside of vertical.

6. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 1, is characterized in that,

The sense of rotation that described 1st parts are located at by described power supply brush has the so circumferential scope of composition on the upside of vertical.

7. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 5, is characterized in that,

Described power supply brush is with on the upside of the vertical of described detected portion and be that the form tilted relative to vertical is arranged.

8. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 1, is characterized in that,

Described power supply brush is arranged in the mode overlapped with described detected portion in the horizontal direction.

9. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 1, is characterized in that,

Described angle detection mechanism is non-contacting electromagnetic induction type sensor.

10. the Ventilsteuerzeitsteuervorrichtung of internal-combustion engine according to claim 9, is characterized in that,

Described detected portion has the excitation conductor of non-circular shape,

Described detection unit has testing circuit, this testing circuit has primary winding and Secondary coil, detect based on being made the induction current that described excitation conductor produces by described primary winding and the induction electromotive force produced in described Secondary coil, thus detect the angle of swing of described motor output shaft.